Blower for applying comminuted material



Y L.. A. KNlGHT BLOWEJFORVV APPLYING 'coMMINUTE-D MATERIAL Oct. .'22, A1940.

Filed June `1'7, 1939 Patented Oct. 22, 1940 BLOWER FOB A'PPLYING COMIMINUTED MATERIAL Lewis Albert Knight, Baltimore, Md., assigner to The Lasting Products Company, Baltimore, Md., a corporation oi' Maryland Applicationsune 17, 1939, semi No. 219,680

4 Claims.,

This invention relates to blowing devices for applying comminuted material in the form of powder, dust, chips or granules upon surfaces of various kinds and has particular reference to devices for blowing comminuted pigments and other finely divided mineral substances upon plastic materials before these plastic materials have become set.

Among the objects of this invention is to provide a blowing device which will dispense with the use of complicated structures, such as intricate nozzle discharge mechanism, pistons, etc.

A further object of this invention is to provide a blowing mechanism which will deliver in a steady and uniform stream comminuted material in powder form as well as comminuted material of larger size.

A further object of this invention is to provide a device of this character which will function efficiently, irrespective of the quantity of comminuted material in the apparatus.

Other, further, and more specific objects of this invention will become readily apparent to persons skilled in the art from a consideration of the following description when taken in conjunction with the accompanying drawing wherein:

Pig. 1 is a vertical section through the apparatus.

Fig. 2 is a cross-section along line 2-2 of Fig. -1.

Fig. 3 is a section through the discharge nozzle of the device taken along line 3 3 of Fig. l.

The apparatus comprises the jar or container 2 having the threaded neck 4 to which is secured the internally-threaded cap or cover 6. 'I'his cap 6 is provided with the anaged bores 8 and I0, which hold in threaded engagement the tubes or nozzles I2 and I4, respectively. Each of these nozzles I2 and Il' is closed at the inner end. The intake nozzle I2 extends close to the bottom I5 of the jar 2, the bottom IB being preferably dome-shaped to give strength and rigidity thereto. The nozzle I2 is provided with air holes or 'perforations I8, preferably on the side remote from nozzle I4 and facing away from nozzle I4 and uniformly spaced, the lower perforation being near the bottom I8 of the jar. The nozzle I2 is connected to an air supply organ (not shown) by means of the pipe 20 fitted with a suitable air gun adapter.

The ejection nozzle" is practically coextensive downwardly with nozzle I2 and also reaches close to the bottom Ii of the jar 2. It is provided with .the perforations 22 which are greater in number and of larger size than the perforations I8 in nozzle I2.

In using my device, powdered or granular material 24 is placed in the jar 2, cap G supporting the nozzles I2 and I4 is screwed onto the jar, and pipe 20 connected to an air gun. By blowing compressed air through pipe 20, then through nozzle I2 and out through the perforations I8 into jar 2 containing the comminuted material 24, the compressed air will pass from jar 2, through the perforations 22, into the nozzle I4 and then leave through the discharge pipe 26, carrying with it entrained particles of the comminuted 4material 24.

I have found by extending the incoming nozzle I2 and the outgoing nozzle I I to practically the same distance from the bottom I6 and distributing the openings in these nozzles as illustrated, that a uniform and steady issue of the comminuted material takes place from the discharge pipe 25. Furthermore, by this arrangement of nozzles and disposition of the perfora-v tions, the steady outflow of comminuted material will continue until practically all of the comninuted material has been blown from the Jar The jar 2 may be made of any suitable material that will withstand Ithe action of the material placed therein. I prefer to make the jar 2 and cap 6 of aluminum. The nozzles I2 and I 4 may Ibe made of .bnonze or other suitable metal.

My device is specially adapted for applying or dashing upon mortar cement, while such cement is in the plastic condition, crushed stone or granules, .powdered materials, such as mica, pigments, stone and slate, chips of stone, diatomaceous earth, kieselguhr, etc., in the formation of falcings of artificial stone or breccia. The device is easy to operate and is free from pants and mechanism that require frequent repair or adjustment.

rlL-'he ypresent invention is not limited to the specific details set forthin the foregoing examples which should be construed as illustrative and not by way of limitation. and in view of fthe numerous modifications which may be effected therein without departing from the spirit and scope of this invention, it is desired that only such limitations be imposed as are indicated in .the appended claims.

Iclaim-as my invention:

1. In a blower for applying comminuted material, a container, a cover for said container, a tubular intake nozzle extending through and supported by said cover and projecting into said container close to the bottom thereof, means for connecting said intake nozzle to a supply of compressed air, said intake nozzle being closed at the inner end and having a plurality of perforations in .the portion projecting into said con tainer, a tubular ejection nozzle extending through and supported by said cover and projecting into said container close to the bottom thereof, and said ejection nozzle being closed at the inner end and having a plurality of perforations in the portion projecting into said container.

2. In a blower for applying material, a container, a cover for said container, a tubular intake nozzle extending through and supported by said cover and .projecting into said container close to .the bottom thereof, means for connecting said intake nozzle to a supply of compressed air, a tubular ejection nozzle extending through and supported by said cover and pmjecting into said container close to the bottom thereof, said intake nozzle being closed at the inner end and having in the por-tion projecting into said container and on the side remote from said ejection nozzle a plurality of perforations, and said ejection nozzle being closed at the inner end and having in the portion projecting into said container a. plurality of perforation.: greater in number and size than said perforations in said intake nozzle.

3. In a blower for applying comminuted material, a container, a detacable cover'for said container, a tubular intake nozzle extending through and supported by said cover and lprojecting into said container close to the bottom thereof, means for connecting said intake nozzle .to a supply of compressed air, a tubular ejection nozzle extending through and supported by said cover and length of said projecting portion.

4. In a blower for applying'comminuted material, a container having a dome-shaped bottom, a detachable cover ior said container, a tubular intake nozzle extending through and supported by said cover and projecting into said container.

means for connecting said intake nozzle to a supply of compressed air, a tubular ejection nozzle extending through and supported by said cover and projecting into said container sub stantially as close to .the bottom of said container as the inner end of said intake nozzle is 'to the Ibottom of said container, -said` intake nozzle being closed at :the inner end and having in the portion projecting into said container and on the side remote from and facing away -f-rom said ejection nozzle a plurality of perforations disposed at different elevations of said container, and said ejection nozzle .being closed at the inner end and having in the portion projecting into said container a plurality of perforations greater in num-ber and size than said perifere-tions in said i intake nozzle and disposed in spaced relation throughout lthe length of said Iprojecting portion.

' LEWIS ALBERT KNIGHT. 

